38978299 has 2 divisors, whose sum is σ = 38978300. Its totient is φ = 38978298.

The previous prime is 38978273. The next prime is 38978311. The reversal of 38978299 is 99287983.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 38978299 - 2⁷ = 38978171 is a prime.

It is not a weakly prime, because it can be changed into another prime (38978239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19489149 + 19489150.

It is an arithmetic number, because the mean of its divisors is an integer number (19489150).

Almost surely, 2^38978299 is an apocalyptic number.

38978299 is a deficient number, since it is larger than the sum of its proper divisors (1).

38978299 is an equidigital number, since it uses as much as digits as its factorization.

38978299 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 55.

The square root of 38978299 is about 6243.2602861005. The cubic root of 38978299 is about 339.0582329052.

The spelling of 38978299 in words is "thirty-eight million, nine hundred seventy-eight thousand, two hundred ninety-nine".